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On any given day, the probability that the Ohio River at Cincinnati is polluted by a carbon tetrachloride spill is .10. Each day, a test is conducted to determine whether the river is polluted by carbon tetrachloride. This test has proved correct 80 percent of the time. Suppose that on a particular day the test indicates carbon tetrachloride pollution. What is the probability that such pollution actually exists?
Decision Trees are graphic displays of the decision process. When do you feel it is appropriate to use decision trees?
an article that deals with sleep and shift-workers.1.what can you tell us about the journal that this article was
Calculate variance of a poisson random variable?
Find the appropriate critical value for the following: 99% confidence level ; n = 17; σ is unknown; population appears to be normally distributed.
The text tells us that a Pearson correlation coefficient is a measure of the strength and direction of a linear relationship between two variables. A scatter plot provides a visual representation of the relationship. Do not take examples from text.
In the business world, the mean salary is often to describe the salaries of employees of a company. However, the median salary may be a better measure of the salaries than the mean. Which is the better measure of central tendency? Why?
A bird lands on a power line of length L
Describe your selected research issue, problem, or opportunity.Formulate a hypothesis statement concerning your selected research issue, problem, or opportunity.Determine your population, and describe which sampling method you would use to generate y..
Define between-groups variance and within-groups variance. How are they different? Which one do we want to be larger in the ANOVA - What are the assumptions of a one-way ANOVA?
In the past, the average age of employees of a large corporation has been 40 years. Recently, the company has been hiring older individuals. In order to determine whether there has been an increase in the average age of all the employees, a sample of..
Lengths of chromosomes in a certain species are uniformly
Researchers conducting a clinical trial randomly assigned 60 patients with painful kneeosteoarthritis evenly into one of four treatment groups: glucosamine, chondroitin, Celebrex, orplacebo. After the study period, patients were asked if they experie..
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